MISTRAS Group to Go Private in $866 Million H.I.G. Capital Deal at $20.35 a Share

MISTRAS Group has signed a definitive agreement to be acquired by affiliates of H.I.G. Capital in an all-cash transaction valuing the company at roughly $866 million, including outstanding debt, according to a GlobeNewswire release carried by CRWE World. Under the terms disclosed, MISTRAS stockholders will receive $20.35 in cash for every share of common stock they own, and the company's board has unanimously approved the deal, which is expected to close in late 2026 or early 2027.

Deal Terms and Premium

The company said the $20.35 offer represents a premium of approximately 8% to MISTRAS's 30-day volume-weighted average share price and 13% to its 90-day volume-weighted average share price, both measured for the period ended September 17, 2026, according to the GlobeNewswire announcement and confirmed in a TradingView report citing Seeking Alpha. MISTRAS also framed the offer as inclusive of 61% share-price appreciation since December 31, 2025, a figure reported by both QuiverQuant and RTTNews.

GuruFocus, tracking the stock on the day of the announcement, reported that MG shares were trading at $19.84, below the $20.35 buyout price, and that the stock sat 114.0% above its intrinsic GF Value of $9.27 — a gap produced by GuruFocus's own valuation model and measured against the market price, not the deal price. GuruFocus separately noted MG's trailing twelve-month price-to-earnings ratio of 23.76x sits below its five-year median of 27.68x, a gap of 3.92 points, or roughly 14.2% below the historical median (our calculation: (23.76 minus 27.68) divided by 27.68, multiplied by 100). GuruFocus's rating framework gave MG a Growth score of 3 out of 10 and a Valuation score of 1 out of 10, alongside sluggish three-year revenue growth of negative 0.2% despite a 56.8% year-to-date share price gain, per the outlet's GF Value analysis.

Go-Shop Window and Shareholder Support

The merger agreement includes a 40-day go-shop period expiring at 11:59 p.m. Eastern Time on October 27, 2026, during which MISTRAS's board, working with financial advisor Baird, is permitted to actively solicit and consider competing acquisition proposals, according to the company's own release. MISTRAS retains the right to terminate the H.I.G. agreement in favor of a superior proposal, subject to a termination fee whose amount was not disclosed in the announcement. The company said there is no assurance the go-shop process will yield a superior proposal and stated it does not intend to disclose developments during the window unless its board determines disclosure is required or appropriate.

Separately, H.I.G. affiliates have entered into voting and support agreements with holders of approximately 31% of MISTRAS's common stock, under which those stockholders agreed to vote all owned shares in favor of the transaction, per QuiverQuant's and RTTNews's reporting. Neither outlet named the specific holders behind that 31% bloc. MISTRAS will file a preliminary proxy statement on Schedule 14A ahead of a special stockholder meeting, with the meeting date to be announced later, and the company's cautionary language lists stockholder approval, competing go-shop offers, and receipt of required regulatory consents as closing risks, without naming any specific antitrust filing requirement or citing a financing condition.

Advisors, Executives and Strategic Framing

Baird is serving as financial advisor to MISTRAS, with Morgan, Lewis & Bockius and Troutman Pepper Locke as legal counsel to the company. Texas Capital Securities is advising H.I.G., with Kirkland & Ellis serving as its legal counsel, according to the deal announcement.

Executive Chairman Manuel N. Stamatakis said the agreement with H.I.G. would deliver "immediate and certain cash value to stockholders," adding that "following extensive engagement with H.I.G., the Board is confident that this agreement is in the best interests of our stockholders and our Company," per the QuiverQuant account of the release. CEO Natalia Shuman tied the sale to the company's ongoing Vision2030 transformation, saying MISTRAS is "excited to crystallize that value and work with H.I.G. to continue to invest in our people, drive innovation across our portfolio and broaden our reach," language reported by CRWE World's GlobeNewswire republication. H.I.G. Managing Director Matt Gullen said the firm has "developed a deep appreciation for the technical expertise, reliability and customer focus required to support mission-critical operations" through its experience with industrial services companies, according to QuiverQuant.

Company Backdrop

The go-private announcement followed a separate MISTRAS release on September 2, 2026, in which the company said it had expanded its U.S. field services footprint with five new locations in Savannah, Georgia; Iron Mountain, Michigan; Waterford, Connecticut; Tulsa, Oklahoma; and St. Paul, Minnesota, targeting demand from energy, power generation, aerospace and defense, advanced manufacturing and data center customers, per MISTRAS's own newsroom post and a corresponding StockTitan writeup. StockTitan's record of the company's recent disclosures also characterizes MISTRAS's second-quarter report as showing "higher revenue, record adjusted EBITDA, reduced leverage, and raised 2026 guidance," though no specific dollar figures for revenue, adjusted EBITDA or net debt appear in the deal announcement itself; on the available disclosures, the roughly $866 million enterprise value therefore cannot be tied to a stated earnings multiple.

GuruFocus also noted that three of the premium investment strategies it tracks currently hold MG shares, with two reportedly adding to positions and one trimming, while company insiders were net sellers over the trailing 12 months, with roughly $61,720 in insider sales and no insider purchases recorded, according to GuruFocus's data as of the announcement date.

Upon completion of the transaction, MISTRAS common stock will no longer be listed on the New York Stock Exchange, according to both RTTNews and GuruFocus.

Bottom Line

MISTRAS's board has unanimously backed a $20.35-per-share, all-cash sale to H.I.G. Capital representing an enterprise value of about $866 million including debt, with a 40-day go-shop running through October 27, 2026 that gives the company a defined but limited window to test whether a higher offer emerges. Holders of roughly 31% of MISTRAS shares have already signed voting and support agreements backing the H.I.G. deal, and the announcement leaves several specifics — including the termination fee, current revenue and EBITDA figures, and any regulatory filing requirements — undisclosed pending the forthcoming proxy statement.